Quarterly report pursuant to Section 13 or 15(d)

Note 14 - Share-based Compensation - Stock Options Outstanding (Details)

v3.19.3
Note 14 - Share-based Compensation - Stock Options Outstanding (Details)
 9 Months Ended
Sep. 30, 2019
$ / shares
shares
Outstanding, shares (in shares) | shares 1,251,893
Outstanding, weighted average remaining contractual life (Year) 8 years 182 days
Outstanding, weighted average exercise price (in dollars per share) $ 5.38
Exercisable, shares (in shares) | shares 533,420
Exercisable, weighted average remaining contractual life (Year) 7 years 109 days
Exercise Price Range 1 [Member]  
Per share exercise price, lower range (in dollars per share) $ 2
Per share exercise price, upper range (in dollars per share) $ 2.99
Outstanding, shares (in shares) | shares 132,900
Outstanding, weighted average remaining contractual life (Year) 6 years 73 days
Outstanding, weighted average exercise price (in dollars per share) $ 2.29
Exercisable, shares (in shares) | shares 132,067
Exercisable, weighted average remaining contractual life (Year) 6 years 73 days
Exercise Price Range 2 [Member]  
Per share exercise price, lower range (in dollars per share) $ 3
Per share exercise price, upper range (in dollars per share) $ 3.99
Outstanding, shares (in shares) | shares 122,905
Outstanding, weighted average remaining contractual life (Year) 7 years 73 days
Outstanding, weighted average exercise price (in dollars per share) $ 3.91
Exercisable, shares (in shares) | shares 115,093
Exercisable, weighted average remaining contractual life (Year) 7 years 73 days
Exercise Price Range 3 [Member]  
Per share exercise price, lower range (in dollars per share) $ 4
Per share exercise price, upper range (in dollars per share) $ 4.99
Outstanding, shares (in shares) | shares 764,971
Outstanding, weighted average remaining contractual life (Year) 9 years 182 days
Outstanding, weighted average exercise price (in dollars per share) $ 4.60
Exercisable, shares (in shares) | shares 161,193
Exercisable, weighted average remaining contractual life (Year) 8 years 328 days
Exercise Price Range 4 [Member]  
Per share exercise price, lower range (in dollars per share) $ 7
Per share exercise price, upper range (in dollars per share) $ 26
Outstanding, shares (in shares) | shares 231,117
Outstanding, weighted average remaining contractual life (Year) 7 years 146 days
Outstanding, weighted average exercise price (in dollars per share) $ 10.51
Exercisable, shares (in shares) | shares 125,067
Exercisable, weighted average remaining contractual life (Year) 6 years 146 days